System for applying brightness signals to a display device and c

Details System for applying brightness signals to a display device and c System for applying brightness signals to a display device and c

1990-10-19

1992-12-08

Oberley, Alvin E.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340793, 340805, G09G 336

Patent

active

051701553

ABSTRACT:
A system for applying brightness signals to the pixels of a display device includes a transmission gate for each column of pixels. The control electrodes of the transmission gates are precharged to the threshold voltage of the gates to substantially increase the speed of the system. Comparators compare brightness voltages to a reference ramp voltage to enhance the speed and accuracy of the system.

REFERENCES:
patent: 3676702 (1972-07-01), McGrogan, Jr.
patent: 4070600 (1978-01-01), Butler et al.
patent: 4532438 (1985-07-01), Reiner
patent: 4742346 (1988-05-01), Gillette et al.
patent: 4766430 (1988-08-01), Gillette et al.
patent: 4841294 (1989-06-01), Clerc
patent: 4963860 (1990-10-01), Stewart
patent: 5017914 (1991-05-01), Uchida et al.
Supertex Inc., Databook 1988-1989, HV08, pp. 11-35 to 11-38 & attachment A, 1988.

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